package com.alili_tv.system.config;

import com.alili_tv.system.common.JacksonObjectMapper;
import com.alili_tv.system.intercepter.AuthorityInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.List;

/**
 * springmvc拦截配置
 * @author BIANP
 */
@Configuration
public class SpringMvcConfig implements WebMvcConfigurer {

    /**
     * 使拦截器受spring管理，以便注入redisTemplate
     */
    @Bean
    public AuthorityInterceptor getAuthorityInterceptor() {
        return new AuthorityInterceptor();
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 拦截所有请求，通过判断是否有 @AuthorityRequired 注解 决定是否需要响应权限
        registry.addInterceptor(getAuthorityInterceptor()).addPathPatterns("/**");
    }

    /**
     * 扩展mvc框架的消息转换器
     * @param converters
     */
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        // 创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        // 设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        // 将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0, messageConverter);
    }

    /**
     * 解决跨域
     * @param registry
     */
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOriginPatterns("*")
                .allowedMethods("GET", "POST", "PUT", "DELETE")
                .allowCredentials(true)
                .maxAge(3600)
                .allowedHeaders("*");
    }
}
